US Patent 10545277 Display device

A display device includes a display element having a display area, a light source, and a light guide element. The light guide element includes a light incident surface that receives incoming light from the light source, an opposite end face opposite to the light incident surface, a light exit surface that emits the light toward the display element, and an opposite plate surface opposite to the light exit surface. The light guide element has a through-hole penetrating the light guide element from the light exit surface to the opposite plate surface, the through-hole corresponding in location to the display area. In an adjacent area adjacent to the opposite end face, a light reflection portion having a reflection surface is disposed, the reflection surface being serrated in a plan view and reflecting light guided by the light guide element to the opposite end face, toward the through-hole.